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(ModeL) 2 Sheets-Sheet 1.

0. W. HALL.

Heel Trimming Machine. No. 240,125. Patented April 12,1881.

MAW ELWHALL N, PETERS, PMQTO-UTHOGRAPHER. WASHINGTON. D c.

UNITED STATES OLIVER W. HALL, OF

PATENT OFFICE.

BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TO GEO. D. HILL, OF SAME PLACE.

HEEL-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 240,125, dated April 12, 1881.

Application filed December 20, 1880. (Model;)

To all whom it may concern Be it known that I, OLIVER W. HALL, of Baltimore city, State of Maryland, have invented certain new and useful Improvements in Heel-Trimming Machines; and I hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in which- Figure 1 is a front elevation. Fig. 2 is a side elevation; Fig. 3, a plan of the machine.

Fig. 4 is a detailed view of a part of the device, showing, in side elevation, the vertically reciprocating or movable cutter-holder. Fig. 5 is a perspective view of the cutter for chamfering the upper edge of the heel. Fig. 6 is a sectional view of the vertically-movable cutter-holder and the heel, and Fig. 7 is a side elevation of the heel.

My invention has reference to machines for cutting and trimming the heels of boots and shoes, and for chamfering the upper edge of the heel where itjoins the shoe-upper; and it has for its object to rapidly and conveniently conform the rough heel to the desired shape,

as determined by a pattern-heel which guides the cutter. e

While the machine is especially designed for cutting or trimming the concave or French heels of ladies shoes, it is applicable for use 0 in forming a heel of any desired shape, 1t being only necessary to insert a pattern-heelof the desired form, and in some cases to insert a peculiarly-formed cutter. In all ordinary cases the U-shaped knife answers the desired end.

In the accompanying drawings, A is the main frame of the machine, supported upon a suitable base by uprights a.

A frame, B, mounted on bars b b, is adapted 40 to slide from side to side of the machine, be-

ing actuated as to its lateral motion by means of wheels a, mounted on the shaft a, which wheels mesh with racks on the upper bars, I),

and are driven by a hand-wheel, a.

Between the uprights (Ht, at either side, are mounted gear-wheels d d, that are keyed on the two-part shaft D, the ends of which are furnished with spurred blocks a, (see Fig. 6,) which securely clamp the heel to be trimmed. 0 An upper shaft, 0, carrying a similar pair of sleeves turn freely on the shafts D 6, but impart to them a longitudinal motion as they are screwed into or out of the sockets.

Between the uprights a a are mounted, on shafts c, the segment-racks 0 (J, which mesh at either end with the wheels d d, and impart to them a partial rotation as the racks are rocked on their pivots. lVithin the frame B is a second frame, I, which is susceptible of a motion within the former at right angles to the shaft 0, and within the frame I are two blocks, I 1', that are only susceptible of a vertical motion with reference to the frame I. Cams or catches a, that are pivoted to the part I, may be thrown up to a vertical position, as shown in Fig. 2, and sustain either of the blocks I I in a raised position, the catch being 7 5 for the purpose brought under a pin, a, that is secured to the block and moves through a slot in the side of the frame I. The blocks I I are normally thrust downward by means of the spring i, which is bifurcated, as shown in Fig. 1, so as to press upon both blocks. To the lower ends of the blocks are secured the cutters J J, and within the central openings of the blocks turns the pattern-heel r. A gage,

q, is adjustably mounted upon a screw-rod, s, having a milled head, i, in each block, and is adapted to bear upon the pattern-heel, as shown in Figs. 4 and 6.

In bearings at the rear of the machine is mounted a shaft, M, which carries a disk, K, 0 having a cam-race, It, on eitherside, and carries, also, a main driving-wheel, m, to which motion is imparted in any convenient way. A shaft, m, carries an arm, I, having apin, m, which engages with the cam-race it on one side 5 of the disk K, and on each end of the shaft n is keyed an arm, 0, to which is pivoted a rod,

0. These rods are connected at 0 to the segment-racks O.

In bearings l is mounted a rock-shaft, car- :00

rying an arm, t, having a pin, 1', which enters the opposite cam-race of the disk K, and to the end of the arm t is pivoted a bifurcated rod, 1, whose ends are connected by a bar,p. On this latter bar is mounted a lug, h, which is attached to the frame I.

Such is, in general terms, a description of the construction of the device. Its operation is as follows:

A suitable pattern heel, r, of any desired shape, being clamped between the parts of the shaft 0, the shoe is similarly clamped between the disks uuon the parts of the shaft D. The longitudinal axis of the heels-both the pattern and the boot hee1--are horizontal at the in ception of the stroke of the cutter, and the gage q is at the front edge of the pattern-heel. The pin m of the arm Z" is at the commencement of that part of the race Ir which is equidistant from the shaft M for about one-third of its length. On turning the wheel at the cam-race on the other side of the disk Kdrives the arm t and bar 1 forward, causing the frame I to move toward the front of the machine. The extent of this motion is sufficient to carry the cutter J from the front edge of the boot-heel to the center of the side of the heel. As this point is reached by the cutter the pin Z reaches a part of the cam-race, which runs for about a third of a turn equidistant from the shaft M, and the carrier or frame 1" remains stationary while the pin traverses that-distance. Pending this, however, and immediately as the frame I ceases its forward motion, the pin on traverses the eccentric portion of the race K and rocks the shaft m". The arms 0 O are thrown forward, rocking the racks O and turning the shafts D and e. The boot-heel is thereby caused to move through a half-turn, and the cuttertraverses its rearportion from side to side. The depth of the cut is determined by the shape of thepattern-heel,as will readilybe understood. As the side of the heel is reached the frame I is again projected forward by a proper configuration of the cam-race, finishing the cut from the side of the heel to its front edge. In a word, the cutter first moves from the front of the heel to the middle of the side, the heel remaining stationary. The heel then moves through a halfturn, while the cutter remains still, and the latter finally, by a forward movement, during which the heel remains at rest, completes the cut to the front of the heel. On continuing the motion ofthe shaft the pins m l reach the beginning of their respective cam-races, and in doing so retract the frame I, and by a reverse motion of the racks 0 bring the pattern and heel to their original positions. Byapartial turn of the Wheel a. the frame B is moved laterally a short distance, and a second cut is made, as above described, and so on until the heel is finished. It is evident that the bootheel is formed by the machine to the exact shape of the pattern-heel, as the cutter is thrust downward at all times to the extent permitted by the gage g, which rests upon the pattern. Pending the forming or trimming of the heel,

the block I is raised; but as soon as the heel is properly brought to shapeI proceed to chamfer its upper edge by means of the cutter J.

On the lower end of the block I is a lug or piece, S, having a smooth curved face, S, adapted to fit against the lower edge of the shoe-upper,while the lip S enters the seam between the heel and upper. The cutter J has a lip, J, which meets the lip S at about an angle of forty-five degrees, and cuts a shaving off the upper edge of the heel T, as shown at n, Fig.7. The operation of the device in using the cutter J is the same as in using the cutter J, except that the depth of the cut is determined by the lug S, the design being to prevent any possible injury to the shoe-upper.

When the heel is trimmed to the desired shape it is removed from the machine and finished and burnished as usual, or the burnishing may be done by substituting a suitable burnisher for the blade J.

I have not considered it necessary to show in detail, in the accompanying drawings, the

configuration of the cam-races on the disk K,

it being remembered that their functions are respectively to rock the racks 0 far enough to impart to the pattern and heel a half-turn, and to slide the frame I a distance equal to that from the edge to near the middle of the heel. No difficulty will be experienced by the ordinary mechanic in projecting them.

The knife J is U-shaped, as shown, and its curvature is, by preference, made to conform to that of the concavity of the heel to be cut.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a heel-trinnning machine, a rotating pattern-heel, a vertically and laterally movable knife-holder, and a rotary clamp for securing the heel to be trimmed, combined and operating as set forth.

2. In a heel-trim min g machine, a knife-holder movable vertically, laterally, and transversely with reference to a rotary pattern-heel and heel-holder, as set forth.

3. In a heel-finishing machine, a knife or burnisher holder having a right-line reciprocating motion, and a pattern-heel and heel-holder having a reciprocating rotary motion, as set forth.

4. In combination with the frame B, having a lateral motion, the horizontally-sliding frame I and vertically-sliding block I, carrying a suitable knife, the pattern heel, and heel-holder, as set forth.

5. In combination with the rotary pattern heel and heel-holder, the frame B, carrying the vertically and laterally movable block I, as set forth.

6. In combination with the supporting-uprights a, the two-part shafts D 6, arranged, as described, to clamp the pattern-heel and bootheel, and a vertically and laterally movable holder for the knife or burnisher, as set forth.

7. In combination with the shafts D e, gears d d, segment-racks O, and actuating mechan- 1 11. In combination with the block I the curved lug S and chamfering-blade J, as set forth.

12. In combination with the heel-holder and pattern-heel, the frame B, carrying the vertically-movable block I, the racks-bars b, and 20 wheels at and a, as set forth.

13. In combination with the frames B I, the heel-holder and pattern-heel and the two-part shafts D e, having threaded sleeves f, as and for the purpose set forth.

OLIVER W. HALL.

Witnesses:

R. D, WILLIAMS, W. A. BERTRAM. 

